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8.d) Air Quality Monthly Site Review - December 2013INDOOR ENVIRONMENT GROUP 2487 7th Ave E North St. Paul, MN 55109 Dust Control Activities Monthly Site Review Report Type: P-1 Investigation summary Abatement/remediation summary Project update r Site Clearance report Additional Reports/information to follow? F Yes Fv-1 No Client: Contact: Date of Investigation City of Scandia Kristina Handt December 17, 2013 Project Name: Report Date: Zavoral Mine Dust Emissions Monitoring 1/14/2014 Project Location: Project # Zavoral Mine, Scandia MN 2055-002 Project Description: Dust control monitoring and oversight during aggregate mining and hauling operations Completed as per DCP Task/Item Notes/Recommendations Yes No N/A Haul Road Paving - maintain first 300 feet x Asphalt millings - main haul road x Dust control application x Haul road is frozen/packed snow Watering - as needed to control dust x No watering due to sub freezing temp Washing - at least 2x per day x " Sweeping - 1-2 times per week x Tracking x Records x Unknown Excavation Area Watering - as necessary x Load equipment washed x Hauling Operations Covered trucks x 15mph site speed x No idle >15 minutes x Trucks washed x Operations in compliance with Dust Control Plan? X Yes No Other: Findings/Recommendations/Actions: Below freezing temps during current mining operations have made watering and washing operations impossible and, for the most part, unnecessary. Biggest issue noted was build up of snow and ice on haul road and out into the Highway 95 intersection. We discussed this issue with site personnel who did clean the intersection and haul road entrance numerous times during our site visit. This should be monitored on an ongoing basis. Remarks: The environmental services provided by Indoor Environment Group's industrial hygienists, technicians, analysts and project managers for this project have been conducted in a manner consistent with the degree of care and technical skill exercised by environmental professionals currently practicing in this area under similar budget and time constraints. Recommendations contained in this report represent our professional judgment at the time the project was performed. This is only a summary of work performed. Following or implementing the recommendations presented should not be considered final completion or closure of this project. Additional work may be necessary to correct current and/or future problems. No warranty is implied or intended. Summary Report Prepared/Submitted by: Summary Report Review by: Dave Gutterud Title: Phone number: Title: Phone number: ector ,Operations 651-779-4300 x6 Sig Signature